A shopkeeper of a subsidised canteen mixed three varieties of rice, X, Y and Z, in the ratio of 4 : 1 : 3 to make a packet of 4 kg of rice. The cost prices per kg of X, Y and Z varieties of rice are ₹2, ₹4 and ₹6, respectively. What is the cost price (in ₹) of the packet of rice?
Find the simple interest (in ₹) on ₹2,500 as a sum borrowed at 7% per year rate of interest for 2 years.
Find the simple interest (in ₹) on ₹2,500 as a sum borrowed at 7% per year rate of interest for 4 years.